Mega Drive/Master System/Mark 3 Rom Flashing

Please note this site is work in progress


You can change the Eprom of a Mega Drive/Genesis/Master System/Mark 3 game cartridge in order to exchange it with another Eprom containing another game or the same game with a different language.


Genesis/Mega Drive:


The rom files found on the internet habe to be byte swapped!


Genesis compatible Eproms:


EPROM / Size
27c400 - 512KBs (4Mbits)
27c800 - 1MBs (8Mbits)
27c160 - 2MBs (16Mbits)
27c322 - 4MBs (32Mbits)

Source: http://www.epforums.org/showthread.php?63960-GUIDE-Make-a-Reprogrammable-Genesis-Cart


confirmed flashed roms:





Master System/Mark 3:


No byteswap needed on rom files!


Master System/Mark 3 compatible Eproms:


27C2001 256KBs (2Mbits)

27C4001 512KBs (4Mbits)



Master System:


Donor Cards:


Game Size Circuit Board Color
After Burner 4 Megabit Brown
Altered Beast 2 Megabit ??
Galaxy Force 4 Megabit Brown
Golden Axe 4 Megabit Brown
Mercs 4 Megabit Brown
Monopoly 1 Megabit, Battery Back-up RAM White
Penguin Land 1 Megabit, Battery Back-up RAM White
Phantasy Star 4 Megabit, Battery Back-up RAM Brown
R-Type 4 Megabit ??
Rastan 2 Megabit Brown
Sagaia 2 Megabit Brown
Space Gun 4 Megabit ??
Space Harrier 2 Megabit White
Spellcaster 4 Megabit Brown


Please refer to this page for more information:

Source: http://www.smspower.org/Development/SMSPagingChips




Homepage online

19.07.2012 - under construction


Update 03.09.2015:

Pinout for Logitech G27 Pedals to Thrustmaster TX/T300GTE Base Adaptorcable


Update 05.09.2015:

- N64 Multinorm schematic


Update 06.09.2015:

- Twin Famicom Stereo Amp schematic

- Philips CD-i 370 Power Supply pinout


Update 25.11.2015:

- N64 Multinorm schematic updated & simple overclocking guide added

- Mega Drive/Master System/Mark 3 Rom Flashing (work in progress)


Update 10.04.2016:
- Thrustmaster TH8A adaptor plate for analog handbrake (WIP)
- little Update in the Raceseat section
Update 14.04.2016:
- Pictures of Prototype adaptor plate for the TH8A Shifter
Update 19.09.2016:
- TH8A adaptor plate updated Design with prototype knob
Update 28.11.2016
- Thrustmaster T300 remove sqeak from Steering Wheel
Update 16.03.2017
- Gaming Rig Update with Pictures
Update 28.03.2017
- Press Information to "Paprium" added
Update 18.05.2017
- Gimx Adaptor Information added  with Fanatec CSL Config File
Update 12.10.2019
- Alex Kidd in Miracle World 2 
deutsche Übersetzung im Download Bereich
Super Besucherzähler für Homepage
Druckversion | Sitemap
Copyright 2012; retrovideogames.de